166066779475 has 12 divisors (see below), whose sum is σ = 208823130000. Its totient is φ = 130982247200.

The previous prime is 166066779427. The next prime is 166066779493. The reversal of 166066779475 is 574977660661.

It is not a de Polignac number, because 166066779475 - 2¹¹ = 166066777427 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46777600 + ... + 46781149.

It is an arithmetic number, because the mean of its divisors is an integer number (17401927500).

Almost surely, 2^166066779475 is an apocalyptic number.

166066779475 is a deficient number, since it is larger than the sum of its proper divisors (42756350525).

166066779475 is an equidigital number, since it uses as much as digits as its factorization.

166066779475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93558830 (or 93558825 counting only the distinct ones).

The product of its (nonzero) digits is 80015040, while the sum is 64.

The spelling of 166066779475 in words is "one hundred sixty-six billion, sixty-six million, seven hundred seventy-nine thousand, four hundred seventy-five".